红外与激光工程, 2015, 44 (2): 0673, 网络出版: 2016-01-26   

一种可连续调谐空间光学衰减器的研究

Research on a continuously tunable space optical attenuator
作者单位
中国电子科技集团公司第二十七研究所,河南 郑州 450007
摘要
:可调谐空间光学衰减器在各类光电系统中具有广泛的应用前景。基于法布里-珀罗多光束干涉原理,创新性地设计了一种适用于相干光束的可调谐空间光学衰减器,该衰减器选取在红外波段具有较高折射率的硒化锌晶体作为材料,结合温度控制系统,实现光功率的调谐。采用Nd:YAG激光器作为光源,对该衰减器的性能进行测量,其调谐范围可以达到3 dB。理论分析表明,相对于热膨胀系数,硒化锌材料的热光系数是决定衰减器性能的关键参量。此外,通过在硒化锌光学平板前后表面镀高反膜,可进一步提高调谐范围。
Abstract
Continuously tunable space optical attenuator has a wide prospect in various optoelectronic equipments. Based on the principle of Fabry-Perot interferometer, a new space optical attenuator was presented, its key component is a ZnSe crystal sheet, combined with a high accurate temperature control system, the attenuation ratio of laser beam can be tuned. The attenuation performance was measured with a Nd:YAG laser as light source. The experimental results indicate that the tuning range of the attenuator can reach 3 dB. Theoretical analysis shows that compared with thermal expansion coefficient, thermo-optic coefficient of ZnSe material plays a key role in determining the attenuator performance. In addition, by coating highly reflective dielectric film on both sides of ZnSe sheet, the tuning range can be further increased.

徐圣奇, 辛玉军, 韩文杰, 王治中, 张文平, 邬双阳, 董光焰, 李卫森. 一种可连续调谐空间光学衰减器的研究[J]. 红外与激光工程, 2015, 44(2): 0673. Xu Shengqi, Xin Yujun, Han Wenjie, Wang Zhizhong, Zhang Wenping, Wu Shuangyang, Dong Guangyan, Li Weisen. Research on a continuously tunable space optical attenuator[J]. Infrared and Laser Engineering, 2015, 44(2): 0673.

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